Many people do not realize the importance of health___they have fallen ill. A. until B.while C.when
—_____ does Kangkang meet his friends? —Four times a month.
The boy likes playing _____ basketball very much.
Bob often _____ his homework after dinner.
The Browns usually drive to the park on Sundays. But today they go to the park_____ foot.
Please be quiet.My grandfather___________ .